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ERIC Number: EJ923700
Record Type: Journal
Publication Date: 2011-Feb
Pages: 5
Abstractor: As Provided
Reference Count: 22
ISSN: ISSN-0021-9584
Degradation of Environmental Contaminants with Water-Soluble Cobalt Catalysts: An Integrative Inorganic Chemistry Investigation
Evans, Alexandra L.; Messersmith, Reid E.; Green, David B.; Fritsch, Joseph M.
Journal of Chemical Education, v88 n2 p204-208 Feb 2011
We present an integrative laboratory investigation incorporating skills from inorganic chemistry, analytical instrumentation, and physical chemistry applied to a laboratory-scale model of the environmental problem of chlorinated ethylenes in groundwater. Perchloroethylene (C[subscript 2]Cl[subscript 4], PCE) a common dry cleaning solvent, undergoes sequential replacement of Cl with H to trichloroethylene (C[subscript 2]HCl[subscript 3]) and subsequently "cis"-dichloroethylene (C[subscript 2]H[subscript 2]Cl[subscript 2]) through catalytic reductive dechlorination with water-soluble cobalt complexes. PCE degradation is monitored by gas chromatography and the first-order rate constants are determined. Experimental conditions may be varied to optimize chlorinated ethylene dechlorination and explore the important parameters governing degradation. Students work with reduction-oxidation active compounds and analyze "real-world" kinetic data sets. (Contains 2 tables and 3 figures.)
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A